Table 1.
Comparison of revision and primary THA groups
| Parameter | Revision THA 93 patients (103 hips) | Primary THA 98 patients (103 hips) | p value |
|---|---|---|---|
| Average age | 45.2 years | 44.3 years | 0.41 |
| Average followup | 6.7 years | 6.6 years | 0.99 |
| Average BMI | 28.8 | 28.5 | 0.72 |
| Comorbidities | |||
| Lupus | 17% | 14% | 0.58 |
| Rheumatoid arthritis | 10% | 7% | 0.53 |
| End-stage renal disease | 4% | 6% | 0.57 |
| Sickle cell anemia | 2% | 2% | 0.96 |
| HIV/AIDS | 1% | 1% | 0.97 |
| % Highly cross-linked polyethylene (overall) | 65% | 68% | 0.66 |
| Mean improvement in scores | |||
| Harris hip score | Pain 12.6 | Pain 18.7 | 0.01 |
| Total 19.2 | Total 34.4 | < 0.001 | |
| UCLA activity score | 0.87 | 2.36 | < 0.001 |
| Overall complication rate | 29% | 6% | < 0.001 |
| Rate of instability | 15% | 3% | 0.002 |
| Survivorship | 69% | 99% | < 0.001 |